<!DOCTYPE html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>

test(function () {
    var child = document.createElement('p');
    assert_true('before' in child);
    var before = 'mine';
    var getAttribute = 'mine';
    with (child) {
        assert_true(before === 'mine');
        assert_false(getAttribute === 'mine');
    }
    assert_true('Symbol' in window);
    var unscopables = Object.getPrototypeOf(child)[Symbol.unscopables];
    assert_true(unscopables.before);
}, 'ChildNode.before() unscopable');

function test_before(nodeName) {
    var child;
    var innerHTML;
    if (nodeName == 'Comment') {
        child = document.createComment('test');
        innerHTML = '<!--test-->';
    } else if (nodeName == 'Element') {
        child = document.createElement('test');
        innerHTML = '<test></test>';
    } else {
        child = document.createTextNode('test');
        innerHTML = 'test';
    }

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before();
        assert_equals(parent.innerHTML, innerHTML);
    }, nodeName + '.before() without any argument.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before(null);
        var expected = 'null' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with null as an argument.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before(undefined);
        var expected = 'undefined' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with undefined as an argument.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before('');
        assert_equals(parent.firstChild.data, '');
    }, nodeName + '.before() with the empty string as an argument.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before('text');
        var expected = 'text' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with only text as an argument.');

    test(function() {
        var parent = document.createElement('div');
        var x = document.createElement('x');
        parent.appendChild(child);
        child.before(x);
        var expected = '<x></x>' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with only one element as an argument.');

    test(function() {
        var parent = document.createElement('div');
        var x = document.createElement('x');
        parent.appendChild(child);
        child.before(x, 'text');
        var expected = '<x></x>text' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with one element and text as arguments.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        child.before('text', child);
        var expected = 'text' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with context object itself as the argument.');

    test(function() {
        var parent = document.createElement('div');
        var x = document.createElement('x');
        var y = document.createElement('y');
        var z = document.createElement('z');
        parent.appendChild(y);
        parent.appendChild(child);
        parent.appendChild(x);
        child.before(x, y, z);
        var expected = '<x></x><y></y><z></z>' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with all siblings of child as arguments.');

    test(function() {
        var parent = document.createElement('div');
        var x = document.createElement('x');
        var y = document.createElement('y');
        parent.appendChild(x);
        parent.appendChild(y);
        parent.appendChild(child);
        child.before(y, x);
        var expected = '<y></y><x></x>' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() when pre-insert behaves like prepend.');

    test(function() {
        var parent = document.createElement('div');
        var x = document.createElement('x');
        parent.appendChild(x);
        parent.appendChild(document.createTextNode('1'));
        var y = document.createElement('y');
        parent.appendChild(y);
        parent.appendChild(child);
        child.before(x, '2');
        var expected = '1<y></y><x></x>2' + innerHTML;
        assert_equals(parent.innerHTML, expected);
    }, nodeName + '.before() with one sibling of child and text as arguments.');

    test(function() {
        var x = document.createElement('x');
        var y = document.createElement('y');
        x.before(y);
        assert_equals(x.previousSibling, null);
    }, nodeName + '.before() on a child without any parent.');

    test(function() {
        var parent = document.createElement('div');
        parent.appendChild(child);
        var doc2 = document.implementation.createDocument("http://www.w3.org/1999/xhtml", "html");
        assert_throws_dom('HierarchyRequestError', () => { child.before(doc2, "foo") });
        assert_equals(parent.firstChild, child);
    }, nodeName + '.before() with a Document as an argument should throw.');
}

test_before('Comment');
test_before('Element');
test_before('Text');

</script>
</html>
